西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (2): 1-8.

• 地质勘探 •     Next Articles

Lithofacies Palaeogeography of Maokou Period in SouthwesternSichuan Basin

Tian Jingchun1, Guo Wei1, Huang Pinghui2, Lin Xiaobing1   

  1. 1. State Key Lab of Oil and Gas Reservoir Geology and Exploitation，Chengdu University of Technology，Chengdu，Sichuan 610059，China；2. Exploration Department，Southwest Oil and Gas Field Company，CNPC，Chengdu，Sichuan 610051，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-04-01 Published:2012-04-01

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Abstract: Abstract：According to the data from field outcrops，drilling section and well logging，the lithologic characteristics and lithofacies
palaeogeography of Maokou Formation in southwest Sichuan Basin are analyzed. The results indicated that Maokou
Formation developed beach and open sea microfacies in southwest Sichuan basin and can be divided into three sedimentary
cycles，which represent the three sea-level fluctuations in Maokou period. The second sedimentary cycle，the phase that sea
level decline，becomes the most important period when shallow beach developed widely with the litholgy of sparite bioclastic
limestone and partial dolomite. Transformed by the later Dongwu movement，shallow beach can be favorable reservoir.

Key words: Southwestern Sichuan Basin, Middle Permian, Maokou Formation, lithofacies palaeogeography, sedimentaryCycle

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